Before Origins, the Levantine Assassins (a.k.a: Hashashin or Assassyun) were considered to be the original order of the Assassin founded by Hassan-i Sabbah as it was in the history of our world. While this is semi-true it is not the whole truth. In AC 2, The Truth states that the Assassins were actually founded by Eve stealing an Apple of Eden and then recruiting Adam and proceeding to start a rebellion against the Isu. There's technically a retcon in the lore for Origins but it's only technically a retcon if you squint at it. Most of AC:O isn't even about the origin story, it's another generic revenge story. It also makes the Assassins vs Templars conflict that was supposed to go on throughout all of human history, much less special.Īnd story wise it was completely unnecessary. Odyssey already showed this and they basically had to dump the Assassins completely for the first time. Not to mention it limits them a lot in terms of making any game before Origins now. I think it was a mistake in hindsight and just a cheap marketing tactic for the big comeback of AC.

They clearly never thought about Bayek and Aya being the one's who create the Brotherhood as we know it back when they were making the first few games. all being a part of the Brotherhood and not just random independent dude's who had similiar ideals. So it's clear that before AC:O came, there was no real concept of 'Proto Assassins' and the Assassins organization was much older with Darius, Wei Yu etc. I haven't seen much discussion on this topic here.

Origin of the assassin brotherhood